Dibucaine hydrochloride is primarily used as a local anesthetic to numb specific areas of the body, particularly in medical procedures such as minor surgeries, dental work, or diagnostic tests. It works by blocking nerve signals in the affected area, providing temporary relief from pain or discomfort. Additionally, it is sometimes applied topically to relieve itching, burning, or pain caused by skin conditions like hemorrhoids, sunburns, or insect bites. In some cases, it may also be used in ophthalmic procedures to anesthetize the eye surface. Its effectiveness and rapid action make it a valuable tool in both clinical and emergency settings for managing localized pain.